Augustus d



(N0 Modell) A.D.KLABER.

DUPLIGATING APPARATUS.

' Patented June 113 1895.

i w w @Q UNITED STATES PATENT OFFICE.

AUGUSTUS D; KLABER, OF NEW YORK, NLY.

D-UPLICATING APPARATUS.

gPECIFIOATION forming part of Letters Patent No. 540,862, dated June 11,1895.

' Applioation filed August 25, 1894:- Serial No. 521327. (No model.)

2'0 all whom it may concern:

Be it known that I, AUGUSTUS D. KLABER, a subject of the Queen of GreatBritain, r'esiding at New York, in the county of New York and State ofNew York, have invented a certain new, useful, and valuableImprovementin Duplicating Apparatus, of which the following is a full,clear, and exact description.

My present invention relates to an improvemeutin duplicatingapparatus'and particularly to that class of duplicating apparatus whichemploys a perforated waxed stencil sheet, over which an inked roller ispassed,

such as the neostyle, 85c.

The object of my invention is to provide means whereby the inking rolleris prevented from inking the stencil beyond the lines of writing.

As a further object my invention provides an apparatus wherein a stencilsheet of about the same width of ordinary letter paper may ,be employed,thus obviating the necessity of folding the stencil sheet at its sidesin order to pass it through an ordinary typewriting machine.

As a further object my invention provides a duplicating apparatus whichis adapted to employ a permanently stretched porous protecting sheet inlieu of using and consuming -a separate protecting sheet with eachstencil,

Figure 1 is a perspective View of my im-- proved apparatus. view of thesame.

Corresponding numerals of reference iudicatethe same parts in the twoviews.

My duplicating apparatus consists essentially of two parts, viz: thebase 1, having the raised portion 2, which is surmounted by a zinc plate3; and the frame 4, hinged to the Fig. 2 is a cross-sectional said baseby the spring hinges 5, which keep the said frame normally opened orlifted. Thesaid frame 4, consists of a lower part 6, secured by saidhinges and having a tongue 7, and of a removable upper part 8 groovedupon its under surface and adapted to set.

over the said lower part and in conjunction therewith it stretches andholds in position a porous protecting sheet 9, preferably of silk gauze.The clamps 10, pivoted to the lower part, serve to hold the upper partin position and prevent the protecting sheet from becoming loose. Inorder to remove said protecting sheet for the purpose of renewing orcleaning, which is only necessary at long intervals,

it is only necessary to unfasten the clamps 10 and lift off the upperpart of the frame, when the sheet can be removed. -Upon the two sides ofthe upper part 8, of the said hinged frame 4, I secure elastic or rubberstrips 11, surmounted by inwardly extending metallic strips 12,preferably made of very thin spring brass. The apparatus is now readyfor the wax stencil sheet, and at this point it is wellto explain thatheretofore it has been necessary to use very wide waxed paper for thestencil sheet for use with all of the standard duplicating apparatussuch as the neostyle, mimeograph, &c. in which apparatus the stencilsheet, especially when made with a type-writing ma chine, together witha porous sheet laid over ,it,had to be of sufficient width and length toextend beyond the edges of the printing plate 3, and be secured betweenthe upper and lower parts, 6, 8, of the hinged frame4. With the presentapparatus the stencil sheet may not be larger than the printing plate 3,thus allowing it to be run through and perforated by an ordinary typewriting machine without either side. Taking a stencil sheet 3, of aboutthe size of a letter sheet, which stencil may contain the perforationsmade by either a type writing machine, neostyle, pen or stylus, it ispressed against the under side of the protecting sheet 9, to which itadheres owing to the sticky nature of the Waxed paper and to the inkwhich permeates through the said porous sheet. In applying the stencilsheet it is necessary to raise the frame 4.

A sheet of paper to be printed is now laidupon the printing plate 3, theframe 4 closed,

the necessity of folding and creasing it at and an inked roller passedover the porous sheet 9, through which theink readily passes, as alsothrough the perforations previously made in the stencil sheet, upon thepaper underneath, leaving thereon an impression of the characters placedupon the stencil sheet, the action of the ink in this particular beingidentical with that of other duplicating apparatus such as the neostyle,850; but the roller instead of inking the entire surface of the stencilor the protecting sheet, as in other like apparatus, is only permittedto ink the stencil to a width about equal to the longest type-writtenline, or between the metallic strips 12.

Another important advantage of the elastic metal strips 12 is that theypermit a pile of blank paper, say one hundred sheets or more, to beplaced upon the printing bed at once, instead of laying one sheet on ata time, the sheets beingremoved from the top of the pile as fast asprinted. In printing from a pile of paper the elasticity of the metalstrips permits the printing frame and the stencil to settle downsquarely on the top sheet.

Numerous changes may be made without avoiding the spirit of my inventionFor instance, I may dispense with the rubber strips 11 and depend uponthe elasticity or spring of the metal strips, 12, alone.

Having described my invention, what- I claim as new, and desire to coverby Letters Patent, is

1. In a duplicating apparatus, the combination with the base plate, of aframchinged to said base-plate, and a flexible strip secured to eachside of the frame and extending inward over the edges of the latter,substantially as described.

2. In a duplicating apparatus, the combination with the frame thereof,an elastic strip secured to each side of the frame, and flexible stripssecured to the elastic strips, said flexible strips extending inward ashort distance, substantially as described.

3. In a duplicating apparatus, the combination with a two-part frame, ofa porous protecting strip stretched between the parts of said frame, anda flexible strip secured to each side of the frame and extendinginwardly and covering, the side edges of the porous strip, substantiallyas described.

4. In a duplicating apparatus, the combination with the two-part framethereof, of a porous protecting sheet stretched between the parts ofsaid frame, elastic strips secured to the top sides of one of theframes, and a flexible strip secured to each elastic strip, saidflexible strips extending inwardly over the edges of the frame,substantially as described.

5. In a duplicating apparatus, the combination with the base platehavinga raised central portion, of a two-part framehinged to saidbase-plate, a bead projecting outward from one of the frame sections, agroove formedin the other section and registering with the bead, meansfor locking the sections together, a porous protecting sheet stretchedand held between the frame sections, and a flexible strip secured to thetop portion on each side of one of the frame sections substantially asdescribed.

6. In a duplicating apparatus, the combination with the base plate, of aframe hinged to said base-plate, a porous sheet carried by the frame,and a flexible strip secured to each side of the frame and extendinginward over the edge of the frameabove the porous sheet, substantiallyas described.

7. In a duplicating apparatus, the combination with the base platehaving a raised central portion, of a frame hinged to said base-plateand surrounding theraised portion a porous protecting sheet carried bythe hinged frame, and a flexible strip secured to each side of thehinged frame above the porous sheet and extending inward over the edgesof the frame and raised central portion, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

AUGUSTUS D. KLABER.

\Vitnesses:

J. GUMBERT. N. S. NEMMARK.

